/*
 * jQuery UI Effects Explode 1.6
 *
 * Copyright (c) 2008 AUTHORS.txt (http://ui.jquery.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI/Effects/Explode
 *
 * Depends:
 *	effects.core.js
 */
(function($) {

    $.effects.explode = function(o) {

        return this.queue(function() {

            var rows = o.options.pieces ? Math.round(Math.sqrt(o.options.pieces)) : 3;
            var cells = o.options.pieces ? Math.round(Math.sqrt(o.options.pieces)) : 3;

            o.options.mode = o.options.mode == 'toggle' ? ($(this).is(':visible') ? 'hide' : 'show') : o.options.mode;
            var el = $(this).show().css('visibility', 'hidden');
            var offset = el.offset();

            //Substract the margins - not fixing the problem yet.
            offset.top -= parseInt(el.css("marginTop")) || 0;
            offset.left -= parseInt(el.css("marginLeft")) || 0;

            var width = el.outerWidth(true);
            var height = el.outerHeight(true);

            for (var i = 0; i < rows; i++) { // =
                for (var j = 0; j < cells; j++) { // ||
                    el
                            .clone()
                            .appendTo('body')
                            .wrap('<div></div>')
                            .css({
                        position: 'absolute',
                        visibility: 'visible',
                        left: -j * (width / cells),
                        top: -i * (height / rows)
                    })
                            .parent()
                            .addClass('effects-explode')
                            .css({
                        position: 'absolute',
                        overflow: 'hidden',
                        width: width / cells,
                        height: height / rows,
                        left: offset.left + j * (width / cells) + (o.options.mode == 'show' ? (j - Math.floor(cells / 2)) * (width / cells) : 0),
                        top: offset.top + i * (height / rows) + (o.options.mode == 'show' ? (i - Math.floor(rows / 2)) * (height / rows) : 0),
                        opacity: o.options.mode == 'show' ? 0 : 1
                    }).animate({
                        left: offset.left + j * (width / cells) + (o.options.mode == 'show' ? 0 : (j - Math.floor(cells / 2)) * (width / cells)),
                        top: offset.top + i * (height / rows) + (o.options.mode == 'show' ? 0 : (i - Math.floor(rows / 2)) * (height / rows)),
                        opacity: o.options.mode == 'show' ? 1 : 0
                    }, o.duration || 500);
                }
            }

            // Set a timeout, to call the callback approx. when the other animations have finished
            setTimeout(function() {

                o.options.mode == 'show' ? el.css({visibility: 'visible'}) : el.css({visibility: 'visible'}).hide();
                if (o.callback)
                    o.callback.apply(el[0]); // Callback
                el.dequeue();

                $('.effects-explode').remove();

            }, o.duration || 500);


        });

    };

})(jQuery);
